8065547421 has 16 divisors (see below), whose sum is σ = 10809787200. Its totient is φ = 5349224448.

The previous prime is 8065547417. The next prime is 8065547449. The reversal of 8065547421 is 1247455608.

It is a happy number.

It is not a de Polignac number, because 8065547421 - 2² = 8065547417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8065547401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 632850 + ... + 645468.

It is an arithmetic number, because the mean of its divisors is an integer number (675611700).

Almost surely, 2^8065547421 is an apocalyptic number.

It is an amenable number.

8065547421 is a deficient number, since it is larger than the sum of its proper divisors (2744239779).

8065547421 is a wasteful number, since it uses less digits than its factorization.

8065547421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13708.

The product of its (nonzero) digits is 268800, while the sum is 42.

The square root of 8065547421 is about 89808.3928204931. The cubic root of 8065547421 is about 2005.4474343420.

The spelling of 8065547421 in words is "eight billion, sixty-five million, five hundred forty-seven thousand, four hundred twenty-one".